cmake/Thirdparty/FindCUDNN.cmake

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# to you under the Apache License, Version 2.0 (the
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#     http://www.apache.org/licenses/LICENSE-2.0
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FIND_PATH(CUDNN_INCLUDE_DIR NAME "cudnn.h" PATHS "$ENV{CMAKE_INCLUDE_PATH}")
FIND_LIBRARY(CUDNN_LIBRARIES NAME "libcudnn.so" PATHS "$ENV{CMAKE_LIBRARY_PATH}")

#message("cudnn include path:${CUDNN_INCLUDE_DIR}  lib path: ${CUDNN_LIBRARIES}")
#message("env include path:$ENV{CUDNN_DIR} next: $ENV{CMAKE_INCLUDE_PATH}")
INCLUDE(FindPackageHandleStandardArgs)
find_package_handle_standard_args(CUDNN DEFAULT_MSG CUDNN_INCLUDE_DIR CUDNN_LIBRARIES)

IF(CUDNN_FOUND)
    FILE(READ ${CUDNN_INCLUDE_DIR}/cudnn.h CUDNN_VERSION_FILE_CONTENTS)
    STRING(REGEX MATCH "define CUDNN_MAJOR * +([0-9]+)"
      CUDNN_MAJOR_VERSION "${CUDNN_VERSION_FILE_CONTENTS}")
    STRING(REGEX REPLACE "define CUDNN_MAJOR * +([0-9]+)" "\\1"
      CUDNN_MAJOR_VERSION "${CUDNN_MAJOR_VERSION}")
    STRING(REGEX MATCH "define CUDNN_MINOR * +([0-9]+)"
        CUDNN_MINOR_VERSION "${CUDNN_VERSION_FILE_CONTENTS}")
    STRING(REGEX REPLACE "define CUDNN_MINOR * +([0-9]+)" "\\1"
        CUDNN_MINOR_VERSION "${CUDNN_MINOR_VERSION}")
    STRING(REGEX MATCH "define CUDNN_PATCHLEVEL * +([0-9]+)"
        CUDNN_PATCH_VERSION "${CUDNN_VERSION_FILE_CONTENTS}")
    STRING(REGEX REPLACE "define CUDNN_PATCHLEVEL * +([0-9]+)" "\\1"
        CUDNN_PATCH_VERSION "${CUDNN_PATCH_VERSION}")

    IF(NOT CUDNN_MAJOR_VERSION)
        SET(CUDNN_VERSION "???")
    ELSE()
      MATH(EXPR CUDNN_VERSION "${CUDNN_MAJOR_VERSION} * 1000 + ${CUDNN_MINOR_VERSION} * 100 + ${CUDNN_PATCH_VERSION}")
    ENDIF()
    MESSAGE(STATUS "Found Cudnn_${CUDNN_VERSION} at ${CUDNN_INCLUDE_DIR} ${CUDNN_LIBRARIES}")
    MARK_AS_ADVANCED(CUDNN_INCLUDE_DIR CUDNN_LIBRARIES)

ENDIF()